Important MCQ on Irrigation Engineering
1) For irrigation purposes, the p-H value of water should be
(a) between 3 and 6
(b) between 6 and 8.5✓
(c) between 8.5 and 11
(d) more than 11
2) Which of the salt present in water is harmful for cultivation purposes?
(a) Sodium carbonate
(b) Potassium sulphate
(c) Calcium sulphate
(d) none of these✓
3) Super-fluous water is also called
(a) capillary water
(b) gravitational water✓
(c) hygroscopic water
(d) all of these
4) A useful soil moisture for plant growth is
(a) capillary water✓
(b) gravitational water
(c) hygroscopic water
(d) all of these
5) The field capacity of a soil depends upon
(a) capillary tension in soil
(b) porosity of soil
(c) either (a) or (b)
(d) both (a) and (b) ✓
6) The duty is largest
(a) at the head of the main canal
(b) at the head of the water course
(c) on the field✓
(d) at all place
7) The duty of irrigation water will be less if
(a) area irrigated is more
(b) water supply required is less
(c) water supply required is more✓
(d) none of these
8) The first watering before sowing the crop, is known as
(a) kor watering
(b) paleo✓
(c) delta
(d) none of these
9) The depth of root zone is 90 cm for
(a) wheat
(b) sugar cane
(c) rice✓
(d) cotton
10) The average delta of rice crop is nearly
(a) 30 cm
(b) 60 cm
(c) 120 cm✓
(d) 150 cm
11) The duty of a crop is 432 hectares per cumec when the base period of the crop is 100 days. The delta for the crop will be
(a) 100
(b) 200✓
(c) 432
(d) 864
12) The average duty for sugar-cane in hectares/cumec is
(a) 200
(b) 400
(c) 600
(d) 800✓
13) The optimum depth of kot watering is 19 cm for
(a) wheat
(b) sugar-cane
(c) rice✓
(d) cotton
14) Outlet discharge for a particular crop is given by
(a) Area / Outlet factor✓
(b) Outlet factor / Area
(c) Area x Outlet factor
(d) none of these
15) The optimum depth of kor watering for wheat in the plains of north India is
(a) 13.5 cm✓
(b) 16.5 cm
(c) 19 cm
(d) 21 cm
16) The hydrology helps in
(a) predicting maximum discharge
(b) deciding capacity of reservoir
(c) fore casting flood
(d) all of these✓
17) The amount of precipitation is measured by
(a) rain gauge✓
(b) osmoscope
(c) turbidimeter
(d) all of these
18) The commonly used rain gauge is
(a) weighing bucket type
(b) tipping bucket type
(c) float type✓
(d) none of these
19) The standard height of a standard rain gauge is
(a) 10 cm
(b) 20 cm
(c) 30 cm✓
(d) 40 cm
20) Run-off is measured in
(a) m3/s✓
(b) m3/min
(c) m3/h
(d) none of these
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| Important MCQ on Irrigation Engineering |
21) A canal sligned nearly parallel to the contours of a country, is known as
(a) side slope canal
(b) contour canal✓
(c) water shed canal
(d) ridge canal
22) The water shed canal is also called
(a) side slope canal
(b) contour canal
(c) ridge canal✓
(d) all of these
23) The saturation gradient in an ordinary loam soil is
(a) 1 ; 1
(b) 2 ; 1
(c) 3 ; 1
(d) 4 ; 1✓
24) The height of dowel above the road level should not be more than
(a) 10 cm
(b) 20 cm
(c) 30 cm✓
(d) 40 cm
25) The width of dowel is, usually, kept from
(a) 0.1 m to 0.3 m
(b) 0.3 m to 0.6 m✓
(c) 0.6 m to 0.9 m
(d) 0.9 m to 1.2 m
26) The soil becomes, practically, infertile if its p-H value is
(a) 0
(b) 7
(c) 11✓
(d) 14
27) The perimeter discharge (P-Q) relation is given by the equation
(a) P = 2.25 Q1/2
(b) P = 2.25 Q3/2
(c) P = 4.75 Q1/2✓
(d) P = 4.75 Q3/2
28) The capacity of escape channel should not be less than
(a) 20%
(b) 30%
(c) 40%
(d) 50%✓
29) The slope of a canal, for a discharge of 300 cumecs, should be
(a) 1 in 4000
(b) 1 in 6000
(c) 1 in 8000✓
(d) 1 in 10000
